Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA 02687839 2009-11-20
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METHOD FOR IDENTIFYING AND LOCATING WIRELESS DEVICES
ASSOCIATED WITH A SECURITY EVENT
Inventors: Judson Mannon Gudgel
Jonathan D. Fairchild
Martin Alan Moon
Reed Jules Oppenheimer
BACKGROUND OF THE INVENTION
1. Technical Field
[0001 ] The present invention relates to a security event. The present
invention particularly relates to a security event and the location and
identification of wireless devices associated with the security event.
2. Background of the Art
[0002] A few large cities have become plagued with gunfire. This gunfire may
be both related and unrelated to the criminal community. For example,
gunfire associated with celebrations has been known to cause injury and
death. Similarly, gunfire associated with gang activity may be slow to be
reported to the authorities resulting in loss of life due to delays in getting
medial attention to injured victims
[0003] Some of the cities have adopted location systems that have proven
effective in the location of the gunfire. Such systems, sometimes referred to
as "gunshot detection systems" are generally known and available. Such
systems can be used to detect the source of an acoustic event, the radial
direction of an event and/or the general proximity of an event.
[0004] Gunfire is not the only basis of concern to security organizations.
Explosions now have become a fact of life in some cites. The threat of
explosions, including explosions that release harmful materials such as
radiation, toxic chemicals, and dangerous biological materials is also a
concern.
[0005] Explosions are often remotely controlled through the use of wireless
devices. Even gunfire may involve wireless devices. For example, a sniper
may be much more effective if the sniper's fire is directed. An explosive
device may be much more effective if it can be activated when a target is in
close proximity. Wireless devices such as cell phones, pagers, and radio
transceivers are often used for these purposes.
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SUMMARY OF THE INVENTION
[0006] In one aspect, the invention is a method for identifying and locating
wireless devices associated with a security event comprising the steps of: 1)
determining a time and a location of a security event; and 2) accessing a
first
wireless network and determining at least one of an ID and a location for at
least a first wireless device within a predetermined proximity of the security
event.
[0007] In another aspect, the invention is such a method further comprising 3)
determining at least one of an ID and a location for a second wireless device
that was in communication with the first wireless device within at least one
of:
a predetermined span of time prior to or concurrent with the time of the
security event, and a predetermined proximity to the security event.
[0008] In yet another aspect the invention is a method for threat monitoring
comprising the steps of: 1) determining a location of interest; and 2)
accessing
at least a one wireless network and determining within a predetermined
proximity of the location interest at least one of: a location of a wireless
device, and an ID for a wireless device.
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BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The invention is further defined by the accompanying drawings,
wherein like numerals refer to like parts throughout, and in which:
FIG. 1 is a flow chart showing the steps of one embodiment of the invention
as claimed in Claims 1 and 2.
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DETAILED DESCRIPTION OF THE INVENTION
[0010] In one embodiment, the invention is a method for identifying and
locating wireless devices associated with a security event. For the purposes
of the present invention, a security event is an event that can result in the
loss
of life, the destruction of property, or the disruption of commercial
activities;
and is of interest to police or military organizations.
[0011 ] The method of the present invention includes determining a time and a
location of a security event. This may be preformed using prior art systems.
For example, one such prior art system is that disclosed in U.S. patent No.
5,973,998 to Showen, et al., which is fully incorporated herein by reference.
Another such system is that of the system disclosed in U. S. Patent No.
6,847,587 to Patterson, et al., which is fully incorporated herein by
reference.
Similarly the method of the present invention may be practiced using at least
some of the components of the systems disclosed in U. S. Patents 5,703,835
to Sharkey, et al., and U.S. Patent No. 5,455,868 to Sergent, et al., which
are
both fully incorporated herein by reference.
[0012] The method of the invention includes accessing a first wireless network
and determining at least one of an ID and a location for at least a first
wireless
device within a predetermined proximity of the security event. In this part of
the method of the invention, the term wireless network means either: 1) A
commercial communications networks such as those that provide cell phone
or pager services, or 2) a network of sensors in wireless communication with
each other and/or a central controller that allow the determination of the
location of a wireless device.
[0013] When the wireless network is a commercial network, then access to
the network may be used to access both ID and location of the wireless
device. This is most often done by using the networks system of tracking the
devices proximity to nearby communication installations. For example, in the
case of a cell phone, the cellular system will track activated phones, even
when they are on standby, so that when a call is sent or received, the nearest
cell tower having the best reception to that device can be used.
[0014] In one embodiment, the wireless device will include a GPS receiver
which will allow for the direct reporting by the wireless device as to its
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location. Any method known to be useful finding the location of a wireless
device known to be useful may be used with the present invention.
[0015] In the practice of the method of the invention, it is sometimes
desirable
to be able to determine the identification (ID) of a wireless device. Certain
information is transmitted by the device when the wireless device is a cell
phone. For example, a mobile identification number uniquely identifies a
mobile unit within a wireless carrier's network. Also available is the
electronic
serial number which is the unit number assigned by a phone manufacturer.
Other devices use analogous information which then can be indexed against
the records of the service provider to get the name, address and any other
information which the provider may have available.
[0016] The method of the invention includes a predetermined proximity for a
security event. Stated another way, for any security event, the proximity of
interest for determining the location and/or ID of a wireless device may be a
function of the type of a security event. Wireless devices of interest can be
used in at least two ways, also depending upon the type of security event.
For example, if the security event is an explosion, then one type of wireless
device of interest may be the device used to activate a detonator, such as
blasting cape, in order to set off the explosive. Another type of wireless
device that may be of interest is a wireless device used to activate a second
wireless device including a detonator. For example in one embodiment of the
invention, both a cell phone attached to blasting caps and an explosive, and a
cell phone used to call the first cell phone to activate the blasting caps
would
be of interest to a security organization.
[0017] For a wireless device attached to an explosive or being held by a
sniper, the proximity to the security event would be limited to the margin of
error in defining the location of the security event. For wireless devices
used
to activate the detonating wireless device, or provide information to a
sniper,
then the proximity will be more, often more than 50 yards, but less than 2
miles.
[0018] If a commercial provider is used to locate the position of a wireless
device, then it is likely that additional information such as the device
owner's
name, address, and the like may be available. If the network is a network of
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sensors, then unless the network is preprogrammed with the appropriate
encryption algorithms, then location may be all that is available.
[0019] In analyzing the data available regarding wireless devices in proximity
to a security event, for an explosion, the most significant data point may be
determining what devices were in the same location as the event and ceased
to function at the same time as the occurrence of the event. Of interest will
be
any device that was in communication with such a device. For a sniping
event, there will not be a cessation of operation, but at least one wireless
device will be in close proximity and the second will be in communication with
the first. If the event occurs in a city, there may be, by coincident, more
than
one set of devices that meet rise to the level of being of interest. In such
an
event, then conventional investigational techniques may be used to determine
which set was the one involved with the indecent. It goes without saying that
while two wireless devices are discussed, there may be three or more
wireless devices involved.
[0020] While the wireless devices may be the same, they do not have to be
the same. For example, a cell phone may be used to contact a wireless
pager to activate a detonator. In the alternative, portable computers may be
used to send and or receive spotting information for a sniper. A portable
device such as a BlackBerry may be used as well. All such wireless devices
would be of interest. Where the types of devices are diverse, then more than
a single commercial wireless network may also be involved and thereby
require access in the practice of the invention.
[0021] In addition to gunshots, security events may include, but not be
limited
to a release of biological materials such as anthrax, a "dirty explosion"
including the broadcasting of radioactive materials, a nuclear explosion, and
an electromagnetic pulse attack against sensitive infrastructure.
[0022] In the practice of the invention, the determining of the time and
location
of a security event may be performed using conventional intelligence
gathering. Preferably, it is done using an automatic sensor array. The longer
the period of time between the security event and the identification and/or
location of wireless devices of interest, then the further away suspects may
be. More importantly, the holding of the devices of interest may be an
important piece of evidence in regard to investigating the security event, and
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as time passes, the opportunities for the suspects to discard the wireless
devices increases. If follows then that in a preferred embodiment, the time
and location of the security event is determined using an automatic systems
such as that disclosed in U. S. Patent No. 6,847,587 to Patterson, et al. In
such application, the identification of the wireless devices could be done in
real time greatly increasing the opportunity for security forces to location
suspects still holding the wireless devices thereby incriminating themselves.
[0023] In one embodiment of the invention, the location of a wireless device
and/or its identification information will allow security organizations to
identify
a suspect. The method the invention may be used to further provide the
security organization with assistance in tracking the suspect's movements.
[0024] In addition to be useful in investigation, the method of the invention
is
also useful in threat monitoring. Threat monitoring, or stated another way,
the prevention of security events, can be performed using the method of the
invention in a number of ways.
[0025] For example when a wireless device is used to activate a detonator for
a bomb, it will necessarily be attached to the bomb. If the bomb is placed
into
an area that is normally subject to traffic, then the identification of a
wireless
device that becomes stationary for an unusually long time may be suspicious.
[0026] In another embodiment, if a wireless device is held by a person on a
list of suspects, then the location of that wireless device in close proximity
to
an area that is the subject of high security vigilance could be a basis for
investigating the person holding the device. This is especially true for a
situation where such a device is observed being moved towards what could
be considered a vulnerable target such as that set forth in detail in Example
2.
[0027] The location of interest for threat monitoring include, but is not
limited
to, convoy routes, military installations, sporting event venues,
entertainment
venues, places of worship, hotels having political figures as guests, points
of
revenue generation such as oil production and transportation facilities, and
the like.
[0028] The following example is provided to more fully illustrate the
invention.
As such, it is intended to be merely illustrative and should not be construed
as
being limitative of the scope of the invention in any way. Those skilled in
the
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art will appreciate that modifications may be made to the invention as
described without altering its scope.
EXAMPLES
Hypothetical Example 1
[0029] A sniper fires at a member of a squad of soldiers. The squad is
equipped with a system that allows for an immediate determination of the
location of the sniper. The location of the sniper at the time of the attack
is
transmitted to the squad whereupon some members take cover and other
members take actions to neutralize the sniper. Concurrent with this, the
method of the invention is employed to determine that the sniper is using a
cell phone and that his cell phone was contacted two minutes prior to the
attack by another cell phone. After the attack, the holder of the second cell
phone is tracked and arrested.
Hypothetical Example 2
[0030] An explosive device, which includes a cell phone as a component in
the detonator for the device, is placed within a garbage can alongside a road.
The road is a location of interest because it is a military convoy route. It
is
noted that a cell phone signal is located adjacent to the road and does not
move for 10 minutes. A convoy is redirected while the location of the bomb is
investigated. The bomb is disarmed.
Hypothetical Example 3
A VIP is expected at a location and the location is put under surveillance
prior
to the arrival of the VIP. A cell phone belonging to a person of interest is
detected in close proximity to the location. The person of interest is located
and interviewed and then removed from the location.
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